Finding the Fourth Proportional to 3,778.59, 5,667.99 and 1,438.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,778.59 : 5,667.99 = 1,438.30 : x
2. Step 2: Convert to fraction form
   3,778.59/5,667.99 = 1,438.30/x
3. Step 3: Cross multiply
   3,778.59x = 5,667.99 × 1,438.30
4. Step 4: Simplify right side
   3,778.59x = 8,152,270.02
5. Step 5: Solve for x
   x = 8,152,270.02/3,778.59
6. Step 6: Final answer
   x = 2,157.49